Electronic apparatus and control method thereof

ABSTRACT

An electronic apparatus includes a projector, an input/output interface, a memory, and a processor that controls the electronic apparatus by executing at least one instruction stored in the memory. The processor obtains screen information of a screen device connected to the electronic apparatus, controls the input/output interface to transmit first operation information corresponding to an unrolling of the screen device in response to receiving a user command to project an image, and controls the projector to project a first image to at least a partial region of a region in which a screen of the screen device is exposed based on the screen information while the screen of the screen device is being unrolled, based on the first operation information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/KR2022/000457, filed on Jan. 11, 2022, which is based on and claimspriority to Korean Patent Application No. 10-2021-0030431, filed on Mar.8, 2021, in the Korean Intellectual Property Office, and Korean PatentApplication No. 10-2021-0127350, filed on Sep. 27, 2021, in the KoreanIntellectual Property Office. The disclosures of each of InternationalApplication No. PCT/KR2022/000457, Korean Patent Application No.10-2021-0030431, and Korean Patent Application No. 10-2021-0127350, areincorporated by reference herein in their entireties.

BACKGROUND 1. Field

Apparatuses and methods described in the disclosure relate to anelectronic apparatus that projects a projected image, and a controlmethod thereof. For example, the disclosure relates to an electronicapparatus that projects an image while a screen device is operated, anda control method thereof.

2. Description of the Related Art

An electronic apparatus having various optical output functions has beendeveloped with the development of technology. For example, there may bea display apparatus, a lighting apparatus, a portable communicationapparatus and a projector. Among these examples, the projector is anelectronic apparatus expanding and projecting output light from a lightsource to a wall or a screen through a projection lens.

With the development of projector technology, the projector may providea projected image by using a screen device having a large screen. Thereis thus an increasing demand for projecting the image only to a regionin which the screen is exposed when the screen of the screen device isunrolled or rolled.

SUMMARY

The disclosure provides an electronic apparatus that projects an imageto a partial region of a region in which a screen is exposed while ascreen device is operated, and a control method thereof.

According to an embodiment of the disclosure, an electronic apparatusincludes a projector, an input/output interface, a memory, and aprocessor that is configured to control the electronic apparatus byexecuting at least one instruction stored in the memory to obtain screeninformation of a screen device connected to the electronic apparatus,control the input/output interface to transmit first operationinformation corresponding to an unrolling of the screen device inresponse to receiving a user command to project an image, and controlthe projector to project a first image to at least a partial region of aregion in which a screen of the screen device is exposed based on thescreen information while the screen of the screen device is beingunrolled, based on the first operation information.

In addition, the processor may control the input/output interface totransmit second operation information corresponding to rolling of thescreen device in response to receiving a user command not to project theimage, and may control the projector to project a second image to the atleast the partial region of the region in which the screen is exposedbased on the screen information while the screen is being rolled, basedon the second operation information.

In addition, the processor may obtain motion information of the screenwhile the screen device unrolls the screen, based on the first operationinformation, and may control the projector to correct the first image,based on the obtained motion information, and to project the correctedfirst image.

In addition, the processor may obtain the motion information, based oninformation on a distance between an upper end of the screen and theelectronic apparatus while the screen device unrolls the screen, basedon the first operation information.

In addition, the processor may obtain vibration information of thescreen by using a vibration sensor while the screen device unrolls thescreen, based on the first operation information, and may control theprojector to correct the first image, based on the vibrationinformation, and to project the corrected first image to the at leastthe partial region of the region in which the screen is exposed.

In addition, the processor may control the projector to project a thirdimage when the motion information has a value greater than or equal to apredetermined value.

In addition, the processor may control the projector to, after thescreen device unrolls the screen based on the first operationinformation, project the first image to the at least the partial regionof the region in which the screen is exposed after a first time elapses.

In addition, the processor may control the input/output interface totransmit the first operation information to an external apparatuscontrolling the electronic apparatus by using a first communicationmethod in response to receiving power-on information of the electronicapparatus from the external apparatus, and may control the projector toproject the first image to the at least the partial region of the regionin which the screen is exposed while the screen is being unrolled as theexternal apparatus transmits the first operation information to thescreen device by using a second communication method.

In addition, the processor may control the input/output interface toreceive, from the screen device, the first operation informationcorresponding to unrolling of the screen device, may control theprojector to project the first image to the at least the partial regionof the region in which the screen is exposed based on the firstoperation information, and may control the projector to project acontent image different from the first image in response to receiving,from the screen device, third operation information indicating that thescreen device completes the unrolling of the screen.

In addition, the processor may control the input/output interface toreceive, from the screen device which receives the first operationinformation, state information indicating that the screen device isunable to unroll the screen, and may allow information indicating thatthe screen device is unable to unroll the screen to be provided based onthe state information.

According to another embodiment of the disclosure, a method of anelectronic apparatus includes obtaining screen information of a screendevice connected to the electronic apparatus, transmitting firstoperation information corresponding to an unrolling of the screen devicein response to receiving a user command to project an image, andprojecting a first image to at least a partial region of a region inwhich a screen of the screen device is exposed based on the screeninformation while the screen of the screen device is being unrolled,based on the first operation information.

In addition, the method may further include transmitting secondoperation information corresponding to rolling of the screen device inresponse to receiving a user command not to project the image, andprojecting a second image to the at least the partial region of theregion in which the screen is exposed based on the screen informationwhile the screen is being rolled, based on the second operationinformation.

In addition, the projecting may include obtaining motion information ofthe screen while the screen device unrolls the screen, based on thefirst operation information, and correcting the first image, based onthe obtained motion information, and projecting the corrected firstimage.

In addition, the obtaining of the motion information may includeobtaining the motion information, based on information on a distancebetween an upper end of the screen and the electronic apparatus whilethe screen device unrolls the screen, based on the first operationinformation.

In addition, the method may further include obtaining vibrationinformation of the screen by using a vibration sensor while the screendevice unrolls the screen, based on the first operation information, andcorrecting the first image, based on the vibration information, andprojecting the corrected first image to the at least the partial regionof the region in which the screen is exposed.

In addition, the projecting may include projecting a third image whenthe motion information has a value greater than or equal to apredetermined value.

In addition, the projecting may include, after the screen device unrollsthe screen based on the first operation information, projecting thefirst image to the at least the partial region of the region in whichthe screen is exposed after a first time elapses.

In addition, the method may further include transmitting the firstoperation information to an external apparatus controlling theelectronic apparatus by using a first communication method in responseto receiving power-on information of the electronic apparatus from theexternal apparatus, and projecting the first image to the at least thepartial region of the region in which the screen is exposed while thescreen is being unrolled as the external apparatus transmits the firstoperation information to the screen device by using a secondcommunication method.

In addition, the method may further include receiving, from the screendevice, the first operation information corresponding to unrolling ofthe screen device, projecting the first image to the at least thepartial region of the region in which the screen is exposed based on thefirst operation information, and projecting a content image differentfrom the first image in response to receiving, from the screen device,third operation information indicating that the screen device completesthe unrolling of the screen.

In addition, the method may further include receiving, from the screendevice which receives the first operation information, state informationindicating that the screen device is unable to unroll the screen, andproviding information indicating that the screen device is unable tounroll the screen, based on the state information.

Additional and/or other aspects and advantages of the disclosure are setforth in part in the description and, in part, are apparent from thedescription, or may be learned by practice of the example embodimentsdisclosed herein.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or other aspects, features, and advantages of the exampleembodiments of the disclosure will become more apparent and more readilyappreciated from the following description of embodiments of thedisclosure, taken in conjunction with reference to the accompanyingdrawings, of which:

FIG. 1 is a view showing an operation of an electronic apparatus basedon a screen device according to an embodiment of the disclosure;

FIG. 2A is a block diagram showing the electronic apparatus according toan embodiment of the disclosure;

FIG. 2B is a block diagram showing a specific configuration of theelectronic apparatus of FIG. 2A;

FIG. 3A is a view showing an example in which a first image is projectedto a partial region of a region in which a screen is exposed, accordingto an embodiment of the disclosure;

FIG. 3B is a view showing another example in which the first image isprojected to the partial region of the region in which the screen isexposed, according to an embodiment of the disclosure;

FIG. 4 is a view showing an example in which the electronic apparatuscontrols the projected first image as the screen is unrolled, accordingto an embodiment of the disclosure;

FIG. 5 is a flowchart showing the electronic apparatus interoperatingwith the screen device, according to an embodiment of the disclosure;

FIG. 6 is a flowchart showing an example in which an external apparatuscontrols the electronic apparatus and the screen device, according to anembodiment of the disclosure;

FIG. 7A is a view showing that the screen is moved as the screen deviceunrolls the screen, according to an embodiment of the disclosure;

FIG. 7B is a view showing an example in which a keystone correction isperformed based on motion information of the screen device, according toan embodiment of the disclosure;

FIG. 7C is a view showing an example in which a third image is projectedbased on the motion information of the screen device, according to anembodiment of the disclosure;

FIG. 8A is a view showing a sensor of the screen device, according to anembodiment of the disclosure;

FIG. 8B is a view showing a configuration of the sensor of the screendevice, according to an embodiment of the disclosure;

FIG. 9 is a view showing a coverage region of an infrared ray (IR)sensor radiated from the screen device, according to an embodiment ofthe disclosure;

FIG. 10 is a view showing state information of the screen device,transmitted from the screen device, according to an embodiment of thedisclosure;

FIG. 11 is a sequence view showing the screen device interoperating withthe electronic apparatus to transmit the state information, according toan embodiment of the disclosure;

FIG. 12 is a flowchart showing the operation of the electronic apparatusaccording to an embodiment of the disclosure;

FIG. 13 is a view showing an electronic apparatus and a screen device,according to an embodiment of the disclosure;

FIG. 14 is a view showing an electronic apparatus and a screen device,according to an embodiment of the disclosure; and

FIG. 15 is a view showing an example in which the electronic apparatusreceives the state information transmitted from the screen device,according to an embodiment of the disclosure.

DETAILED DESCRIPTION

Embodiments described in the disclosure and configurations shown in thedrawings are merely examples of the embodiments of the disclosure, andmay be modified in various different ways to replace the embodiments anddrawings of the disclosure. The disclosure will be described more fullyhereinafter with reference to the accompanying drawings, wherein likereference characters refer to like elements.

FIG. 1 is a view showing an operation of an electronic apparatus basedon a screen device, according to an embodiment of the disclosure.

An electronic apparatus 100 according to the disclosure may be anapparatus of any of various types. In particular, the electronicapparatus 100 may be a projector apparatus that expands and projects animage to a wall or a screen, and the projector apparatus may be adigital light processing (DLP) type projector using an LCD projector ora digital micromirror device (DMD).

In addition, the electronic apparatus 100 may be a home or industrialdisplay apparatus, may be a lighting apparatus used in daily life, ormay be an audio apparatus including an audio module. The electronicapparatus 100 may be implemented as a portable communication apparatus(e.g., smartphone), a computer apparatus, a portable multimediaapparatus, a wearable apparatus or a home appliance apparatus.Meanwhile, the electronic apparatus 100 according to an embodiment ofthe disclosure is not limited to the above-described apparatuses, andmay be implemented as the electronic apparatus 100 having two or morefunctions of the above-described apparatuses. For example, theelectronic apparatus 100 may be used as the display apparatus, thelighting apparatus or the audio apparatus by turning off its projectorfunction and turning on a lighting function or a speaker function, ormay be used as an artificial intelligence (AI) speaker including amicrophone or a communication apparatus, based on the operation of theprocessor.

Referring to FIG. 1, the electronic apparatus 100 according to thedisclosure may project the image to at least a partial region of aregion in which a screen 210 of a screen device 200 is exposed. Forexample, the screen device 200 may electrically unroll the screen 210 tounfold the screen 210, or electrically roll the screen 210 to fold thescreen 210. In addition, the electronic apparatus 100 may project theimage to the partial region of the region in which the screen 210 isexposed, while the screen 210 is unrolled or rolled.

Referring to FIG. 1, the screen device 200 may unfold the screen 210 byunrolling the screen 210 at a predetermined speed. Here, thepredetermined speed may be predetermined by a manufacturer when thescreen device 200 is manufactured or determined by a user. In addition,while the screen 210 is unrolled at the predetermined speed, theelectronic apparatus 100 may project a first image to a 1-1-th region10-1 of a region “b,” in which the screen 210 is exposed. Here, thefirst image may be a welcome image provided while the screen 210 isunrolled. According to the disclosure, a size of the first image may bechanged based on a size of the region in which the screen 210 isexposed. For example, the first image according to the disclosure may beprojected to have the same animation effect as the image climbing upfrom the region while the region is expanded as the screen 210 isunrolled.

In addition, the first image for minimizing motion sickness of the usermay be provided based on information on motion of the screen 210, asdescribed below with reference to the following drawings.

When generally projected by the electronic apparatus 100, the image maybe projected to a first region 10, and may thus also be projected to a1-2-th region 10-2 in which the screen is not exposed. In this regard,the electronic apparatus 100 according to the disclosure may project theimage only to the region in which the screen is exposed, by projectingthe first image to the at least partial region of the region of thescreen 210 of a height “b,” when the screen 210 is unrolled by theheight “b” at the predetermined speed. In an embodiment, the electronicapparatus 100 may project the first image to the region between a height“a” and the height “b” when the screen 210 is unrolled by the height“a.” Here, the height “a” may be a minimum height of the screen at whichthe electronic apparatus 100 may project the image. That is, theelectronic apparatus 100 may project the first image to the region ofthe screen 210 between the height “a” and the height “b,” from a timepoint when the screen 210 reaches the height “a.” In addition, when thescreen 210 reaches its maximum height, the electronic apparatus 100 mayproject the image to an entire region of the screen 210.

In addition, when the region in which the screen is exposed is changedas the screen 210 is unrolled, the electronic apparatus 100 may projectthe first image whose size is changed to correspond to the changedregion.

FIG. 2A is a block diagram showing the electronic apparatus according toan embodiment of the disclosure.

Referring to FIG. 2A, the electronic apparatus 100 includes a projector111, a memory 112, an input/output interface 113 and a processor 114.

The projector 111 may perform a function of outputting the image to aprojection plane. A detailed description of the projector 111 isdescribed with reference to FIG. 2B. Here, although described as theprojector, the electronic apparatus 100 may project the image in variousways. Here, the projector 111 may include a projection lens. Here, theprojection plane may be a portion of a physical space where the image isoutput, or may be a separate screen.

The memory 112 according to the disclosure may store screen informationof the screen device. A detailed description of the memory 112 isdescribed with reference to FIG. 2B.

The input/output interface 113 is a component for performingcommunication with an external apparatus. In detail, the input/outputinterface 113 may transmit a control instruction to the externalapparatus and receive the control instruction therefrom. In addition,the input/output interface 113 may perform the communication with theexternal apparatus to input/output at least one of an audio signal or animage signal. A detailed description of the input/output interface 113is described with reference to FIG. 2B.

The processor 114 may perform an overall control operation of theelectronic apparatus 100. In detail, the processor 114 may obtain thescreen information of the screen device 200 connected to the electronicapparatus 100. The screen information according to the disclosure mayinclude information on a size of the screen 210, first screeninformation on a speed at which the screen 210 is unfolded as the screen210 of the screen device 200 is unrolled, and second screen informationon a speed at which the screen 210 is folded as the screen 210 isrolled. For example, the processor 114 may obtain, as the screeninformation, the screen information of the screen device 200 amonginformation on the plurality of screen devices pre-stored in the memory112 or an external server, based on the manufacturer and product name ofthe screen device 200.

In addition, the processor 114 may obtain information on a first time atwhich an upper end of the screen 210 reaches a minimum height of theimage projected by the electronic device 100 and information on a secondtime at which the screen reaches its maximum height when the screen 210is unrolled based on the first screen information. The processor 114 mayalso obtain information on a third time at which the upper end of thescreen 210 reaches the minimum height of the image projected by theelectronic device 100 when the screen 210 is rolled based on the secondscreen information.

For example, the processor 114 may obtain the information on the firsttime, the second time, and the third time based on the screeninformation and information on a distance between the electronicapparatus 100 and the screen device 200.

In addition, when receiving a user command to project the image, theprocessor 114 may control the input/output interface 113 to transmitfirst operation information corresponding to unrolling of the screendevice (first operation information instructing the screen device 200 tounroll a screen) to the screen device 200.

According to the disclosure, the user command to project the image maybe a user command to turn on power of the electronic apparatus 100 orthe user command to project the image by using the electronic apparatus100. In addition, the electronic apparatus 100 may receive the usercommand to project the image from the external apparatus that maycontrol the electronic apparatus 100, or may receive the user command toproject the image through a physical button included in the electronicapparatus 100.

According to the disclosure, the first operation information may includea control instruction to unroll the screen 210. When receiving the firstoperation information, the screen device 200 may unroll the screen,based on the first operation information. That is, when receiving thefirst operation information, the screen device 200 may unroll the screen210 at a speed corresponding to the first screen information. In anembodiment, the processor 114 may control the input/output interface 113to transmit the first operation information to the screen device 200 inan infrared ray (IR) communication method or a radio frequency (RF)communication method. However, the above-described communication methodsmay be used only when the screen device 200 is only possible to receivethe information and impossible to transmit the information. That is,when the screen device 200 is implemented to receive the informationfrom the electronic apparatus 100, the electronic apparatus 100 and thescreen device 200 may communicate with each other by using variousmethods such as a WiFi method, a Bluetooth method, the IR communicationmethod, the RF communication method, an Ethernet method and a universalasynchronous receiver/transmitter (UART) method, which is describedbelow with reference to the following drawings.

In addition, the processor 114 may control the projector 111 to projectthe first image to the at least partial region of the region in whichthe screen 210 is exposed based on the screen information while thescreen 210 of the screen device 200 is unrolled based on the firstoperation information. Here, the first image may be the welcome imageprovided while the screen 210 is unrolled. According to the disclosure,a size of the welcome image may be changed based on the size of theregion in which the screen 210 is exposed. In addition, the welcomeimage for minimizing the motion sickness of the user may be providedbased on the motion information of the screen 210, as described belowwith reference to the following drawings.

In an embodiment, after the screen device 200 starts to unroll thescreen 210 based on the first operation information, the processor 114may control the projector 111 to project the first image to the regionin which the screen is exposed after the first time. Here, the firsttime may be a time at which the upper end of the screen 210 reaches theminimum height of the image projected by the electronic device 100, andmay be identified based on the information on the first time.

However, the disclosure is not limited thereto. In an embodiment of thedisclosure, the electronic device 100 may include the projector 111capable of vertically shifting the lens or the projector 111 may have aprojection region adjustable made by a motor. In this case, theprojector 111 may project the first image from a time point when thescreen device 200 starts to unroll the screen 210.

In addition, the processor 114 may control the projector 111 to projecta content image when the screen device 200 completes the unrolling ofthe screen, based on the screen information. The content image accordingto the disclosure may be an image provided by the electronic apparatus100 or an image provided by the external apparatus connected to theelectronic apparatus 100.

In addition, the processor 114 may control the input/output interface113 to transmit second operation information corresponding to rolling ofthe screen device 200 (second operation information instructing thescreen device 200 to roll the screen) to the screen device 200 whenreceiving a user command not to project the image.

According to the disclosure, the user command not to project the imagemay be a user command to turn off the power of the electronic apparatus100 or a user command not to project the image. In addition, theelectronic apparatus 100 may receive the user command not to project theimage from the external apparatus that may control the electronicapparatus 100, or may receive the user command not to project the imagethrough the physical button included therein.

According to the disclosure, the second operation information mayinclude a control instruction to roll the screen 210. The screen device200 may roll the screen, based on the second operation information whenreceiving the second operation information. That is, the screen device200 may roll the screen 210 at a speed corresponding to the secondscreen information when receiving the second operation information.

In addition, the processor 114 may control the projector 111 to projectthe second image to the at least partial region of the region in whichthe screen 210 is exposed based on the screen information while thescreen 210 of the screen device 200 is rolled based on the secondoperation information. Here, the second image may be a farewell imageprovided while the screen 210 is rolled. According to the disclosure, asize of the farewell image may be changed based on the size of theregion in which the screen 210 is exposed. For example, the second imageaccording to the disclosure may be projected to have the same animationeffect as the image climbing down from the region while the region isreduced as the screen 210 is rolled.

In addition, the farewell image for minimizing the motion sickness ofthe user may be provided based on the motion information of the screen210, as described below with reference to the following drawings.

In an embodiment of the disclosure, while the first image and the secondimage are projected, the electronic device 100 may correct and projectthe first image and the second image, based on the motion information ofthe screen 210. In detail, the processor 114 may obtain the motioninformation of the screen 210 while the screen device unrolls thescreen, based on the first operation information. In addition, theprocessor 114 may obtain the motion information of the screen 210 whilethe screen is rolled based on the second operation information.

That is, when the electronic apparatus 100 is an ultra-short throwprojector apparatus, the electronic apparatus 100 and the screen device200 may have a close distance therebetween. In this case, if the screen210 of the screen device 200 is shaken as the screen 210 is rolled orunrolled, a horizontal size of the image projected to the screen 210 maybe significantly changed even with such a small shake. The processor 114according to the disclosure may thus provide the first image and thesecond image in consideration of the motion of the screen 210, based onthe motion information of the screen 210.

In an embodiment of the disclosure, the processor 114 may obtain themotion information, based on the information on a distance between theupper end of the screen 210 and the electronic apparatus 100. Forexample, when the electronic apparatus 100 includes a sensor (e.g., atime of flight (Tof) sensor, depth sensor, or camera sensor) thatidentifies a distance from the sensor itself to an external object, theprocessor 114 may obtain the information on the distance between theupper end of the screen 210 and the electronic apparatus 100 by usingthe sensor. Here, if the sensor is implemented as the camera sensor, theprocessor 114 may control the projector 111 to output a separate testpattern and obtain the information on the distance between the upper endof the screen 210 and the electronic apparatus 100 by photographing thetest pattern by using the camera. In addition, the processor 114 mayobtain the information on the distance between the upper end of thescreen 210 and the electronic apparatus 100 from an external sensor.However, the disclosure is not limited thereto, and the processor 114may obtain the motion information, based on information on a distancebetween a central portion of the region in which the screen 210 isexposed and the electronic apparatus 100.

In an embodiment of the disclosure, when a vibration sensor is attachedto the screen device 200, the processor 114 may obtain vibrationinformation of the screen 210 by using the vibration sensor, and obtainthe motion information of the screen 210, based on the vibrationinformation. However, the disclosure is not limited thereto, and thevibration sensor may be positioned in the screen device 200. In detail,the processor 114 may detect a wavelength of the screen 210, based onthe vibration information obtained by the vibration sensor, and obtainthe motion information of the screen device 200, based on the detectedwavelength.

In an embodiment of the disclosure, when a patch detectable by having apredetermined pattern is attached on the back side of the screen 210,the processor 114 may detect the patch by using the sensor to obtain themotion information of the screen device 200 while the screen 210 isunrolled or rolled.

In an embodiment of the disclosure, while the screen 210 is unrolled orrolled, a grid pattern in an invisible region such as an infrared regionmay be output, and the processor 114 may detect the grid pattern byusing the sensor to obtain the motion information of the screen device200.

In addition, while the first image is projected, the processor 114 maycorrect the first image, based on the motion information, and maycontrol the projector 111 to project the corrected first image. Inaddition, while the second image is projected, the processor 114 maycontrol the second image to be corrected based on the motioninformation, and may control the projector 111 to project the correctedsecond image. Each correction for the first image and the second imagemay include a keystone correction, and its details are described belowwith reference to FIG. 7B.

In an embodiment of the disclosure, the processor 114 may control theprojector 111 to project a third image when the motion information has avalue greater than or equal to a predetermined value while the firstimage is projected. That is, if the screen 210 has large motion whilethe screen 210 is unrolled or rolled, a third image may be projected tominimize the motion sickness of the user. Details of the third image aredescribed below with reference to FIG. 7C.

In an embodiment of the disclosure, the electronic apparatus 100 and thescreen device 200 may be controlled by an external apparatus 300 (seeFIG. 6) which may control the electronic apparatus 100. In detail, theprocessor 114 may control the input/output interface 113 to transmit thefirst operation information to the external apparatus 300 controllingthe electronic apparatus 100 by using the first communication methodwhen receiving power-on information for turning on the power of theelectronic apparatus 100 from the external apparatus 300 by using afirst communication method. In addition, the external apparatus 300 maytransmit the first operation information to the screen device 200 byusing a second communication method, and when receiving the firstoperation information, the screen device 200 may unroll the screen 210,based on the first operation information. In addition, while the screenis unrolled, the processor 114 may control the projector 111 to projectthe first image to the at least partial region of the region in whichthe screen is exposed. For example, the first communication method maybe the Bluetooth communication method, and the second communicationmethod may be the IR communication method. The description describes anexample of controlling the electronic apparatus 100 and the screendevice 200 by using the external apparatus 300 below with reference toFIG. 6.

In an embodiment of the disclosure, the screen device 200 may beimplemented to transmit state information of the screen device 200 tothe electronic apparatus 100. In this case, the electronic apparatus 100and the screen device 200 may communicate with each other by usingvarious methods such as the WiFi method, the Bluetooth method, the IRcommunication method, the RF communication method, the Ethernet method,and the UART method. The processor 114 may control the input/outputinterface 113 to receive the first operation information correspondingto unrolling of the screen device 200 from the screen device 200 whenthe screen device 200 is implemented to transmit the information to theelectronic apparatus 100. For example, when powered on, the screendevice 200 may transmit the first operation information to theelectronic apparatus 100. The processor 114 may control the projector111 to project the first image to the at least partial region of theregion in which the screen is exposed based on the first operationinformation when the electronic apparatus 100 receives the firstoperation information corresponding to unrolling of the screen device200 from the screen device 200. In addition, the processor 114 maycontrol the projector 111 to project the content image different fromthe first image when receiving third operation information indicatingthat the screen device 200 completes the unrolling of the screen fromthe screen device 200. For example, the screen device 200 may transmitthe third operation information to the electronic apparatus 100 whencompleting the unrolling of the screen. In addition, the processor 114may control the input/output interface 113 to receive the secondoperation information corresponding to unrolling of the screen device200 from the screen device 200. For example, when powered off, thescreen device 200 may transmit the second operation information to theelectronic apparatus 100. The processor 114 may control the projector111 to project the second image to the at least partial region of theregion in which the screen is exposed based on the second operationinformation when the electronic apparatus 100 receives the secondoperation information corresponding to rolling of the screen device fromthe screen device 200. The description describes a case, in which thescreen device 200 is implemented to transmit the information to theelectronic apparatus 100, in detail below with reference to FIG. 11.

In an embodiment of the disclosure, when implemented to transmit theinformation on its state to the electronic apparatus 100, the screendevice 200 may transmit, to the electronic apparatus 100, the stateinformation indicating that the screen device 200 is unable to unroll orroll the screen. For example, the screen device 200 may receive thefirst operation information from the electronic apparatus 100, and maybe unable to unroll the screen 210 because the screen device 200 isoverheated. In this case, the screen device 200 may transmit the stateinformation indicating that the screen device 200 is unable to performan unrolling of the screen to the electronic apparatus 100. For example,the screen device 200 may receive the first operation information fromthe electronic apparatus 100, and may be unable to unroll the screen 210due to an external physical force applied to the screen device 200. Inthis case, the screen device 200 may transmit the state informationindicating that the screen device 200 is unable to unroll the screen tothe electronic apparatus 100. In detail, the screen device 200 maydetect the external physical force that makes the screen 210 unable tounroll the screen, by using the sensor.

In addition, the processor 114 may control the input/output interface113 to receive the state information indicating that the screen device200 is unable to unroll the screen from the screen device 200, and mayallow information indicating that the screen device 200 is unable tounroll the screen to be provided based on the state information. Forexample, the processor 114 may control the projector 111 to project auser interface (UI) image indicating that the screen device 200 isunable to unroll the screen. For example, the processor 114 may controlan audio output device 116 described below with reference to FIG. 2B tooutput a voice informing that the screen device 200 is unable to unrollthe screen. For example, the processor 114 may allow the informationindicating that the screen device 200 is unable to unroll the screen tobe transmitted to the external apparatus 300, thereby allowing theexternal apparatus 300 to display the UI image indicating that theoperation of unrolling the screen is impossible or output the voiceindicating that the operation of unrolling the screen is impossible.

The description describes that the screen 210 of the screen device 200is unfolded by rising and being unrolled from the screen device 200installed on the floor or the like with reference to FIGS. 1 and 2A.However, the disclosure is not limited thereto. The screen 210 may beunfolded by going down and being unrolled from the screen device 200installed on a ceiling or the like, and an example of this case isdescribed below with reference to FIG. 13.

FIG. 2B is a block diagram showing an example configuration of theelectronic apparatus of FIG. 2A.

Referring to FIG. 2B, the electronic apparatus 100 may include at leastone of the projector 111, the memory 112, the input/output interface113, the processor 114, a user interface 115, the audio output device116, or a power supply device 117. Omitted here are the contents alreadydescribed with reference to FIG. 2A among the descriptions of theprojector 111, the memory 112, the input/output interface 113 and theprocessor 114. Meanwhile, the configuration shown in FIG. 2B is only anexample embodiment, from which some configurations may thus be omitted,and to which a new configuration may be added.

The projector 111 may be a component that projects the image to anexternal source. According to an embodiment of the disclosure, theprojector 111 may be implemented to have various projection types (e.g.,cathode-ray tube (CRT) type, liquid crystal display (LCD) type, digitallight processing (DLP) type, and laser type). For example, the CRT typemay basically be the same as a CRT monitor. The CRT type may display theimage on the screen by expanding the image by using a lens in front of acathode-ray tube (CRT). According to the number of the CRTs, the CRT maybe divided into a single tube type and a three tube type, and in case ofthe three tube type, red, green and blue CRTs may be implementedseparately from one another.

For another example, the LCD type may display the image by allowinglight emitted from a light source to transmit through a liquid crystal.The LCD type may be divided into a single-panel type and a three-paneltype. In case of the three-plate type, the light emitted from the lightsource may be separated into red, green, and blue in a dichroic mirror(which is a mirror that reflects only light of a specific color andallows the rest to pass therethrough), may then pass through the liquidcrystal, and may then be collected again.

For yet another example, the DLP type may display the image by using adigital micromirror device (DMD) chip. The DLP type projector mayinclude a light source, a color wheel, a DMD chip, a projection lens,etc. Here, light output from the light source may be colored as thelight passes through a rotating color wheel. The light passing throughthe color wheel may be input to the DMD chip. The DMD chip may includenumerous micromirrors and reflect the light input to the DMD chip. Theprojection lens may serve to expend the light reflected from the DMDchip to a size of the image.

For yet still another example, the laser type may include a diode pumpedsolid state (DPSS) laser and a galvanometer. The laser type that outputsvarious colors may use a laser in which three DPSS lasers arerespectively installed for a red-green-blue (RGB) color, and its opticalaxes overlap each other by using a special mirror. The galvanometer maymove the mirror at high speed by including the mirror and a high-powermotor. For example, the galvanometer may rotate the mirror at up to 40KHz/sec. The galvanometer may be mounted based on a scan direction. Ingeneral, the projector may use a flatbed scanning, and the galvanometermay thus also be divided into x and y axes.

Meanwhile, the projector 111 may include various types of light sources.For example, the projector 111 may include at least one light source ofa lamp, a light emitting diode (LED) and a laser.

The projector 111 may output the image in an aspect ratio of 4:3, anaspect ratio of 5:4, and a wide aspect ratio of 16:9, based on a purposeof the electronic apparatus 100, a user determination or the like, andmay output the image having any of various resolutions such as widevideo graphics array WVGA (854*480 pixels), super video graphics arraySVGA (800*600 pixels), extended graphics array XGA (1024*768 pixels),wide extended graphics array WXGA (1280*720 pixels), WXGA (1280*800pixels), super extended graphics array SXGA (1280*1024 pixels), ultraextended graphics array UXGA (1600*1200 pixels) and full high-definitionHD (1920*1080 pixels), based on the aspect ratio.

Meanwhile, the projector 111 may perform various functions adjusting theoutput image under the control of the processor 114. For example, theprojector 111 may perform a zoom function, a keystone function, a quickcorner keystone (i.e., four-corner keystone) function, and a lens shiftfunction.

In detail, the projector 111 may expand or reduce the image based on adistance from the screen (i.e., projection distance). That is, theprojector 111 may perform the zoom function based on the distance fromthe screen. Here, the zoom function may include a hardware method inwhich a size of the screen is adjusted by moving a lens and a softwaremethod in which the size of the screen is adjusted by cropping theimage. Meanwhile, when performing the zoom function, it is necessary toadjust a focus of the image. For example, a method of adjusting thefocus may include a manual focusing method, an automatic focusingmethod, etc. The manual focusing method may be a method of manuallyfocusing the image, and the automatic focusing method may be a method inwhich the projector automatically focuses the image by using a built-inmotor when performing the zoom function. When performing the zoomfunction, the projector 111 may provide a digital zoom function by usingsoftware, and may provide an optical zoom function in which the zoomfunction is performed by moving the lens by using a driver.

In addition, the projector 111 may perform the keystone function. When aheight does not match a front projection, the screen may be distorted upor down. The keystone function may be a function to correct thedistorted screen. For example, when the distortion occurs on the screenin the left and right directions, the distortion may be corrected usinga horizontal keystone, and when the distortion occurs on the screen inthe vertical direction, the distortion may be corrected using a verticalkeystone. The quick corner keystone (i.e., four-corner keystone)function may be a function to correct the screen when a center region ofthe screen is normally balanced and its corner regions are unbalanced.The lens shift function may be a function to move the screen as it iswhen the screen is off the screen.

Meanwhile, the projector 111 may provide the zoom/keystone/focusfunctions by automatically analyzing a surrounding environment and aprojection environment without a user input. In detail, the projector111 may automatically provide the zoom/keystone/focus functions, basedon the distance between the electronic apparatus 100 and the screen,detected by the sensor (e.g., ToF sensor, distance sensor, infraredsensor or illumination sensor), information on a space where theelectronic apparatus 100 is currently positioned, information on anamount of ambient light, etc.

In addition, the projector 111 may provide the lighting function byusing the light source. In addition, the projector 111 may provide thelighting function by outputting the light source by using the LED.According to an embodiment, the projector 111 may include one LED, andaccording to another example, the electronic apparatus may include theplurality of LEDs. Meanwhile, the projector 111 may output the lightsource by using a surface-emitting LED based on an implementationexample. Here, the surface-emitting LED may be an LED in which anoptical sheet is disposed on an upper side of the LED for the lightsource to be evenly distributed and output. In detail, when the lightsource is output through the LED, the light source may be evenlydistributed through the optical sheet and the light source dispersedthrough the optical sheet may be incident on a display panel.

Meanwhile, the projector 111 may provide the user with a dimmingfunction to adjust intensity of the light source. In detail, whenreceiving the user input for adjusting the intensity of the light sourcefrom the user through a user interface 240 (e.g., touch display buttonor dial), the projector 111 may control the LED to output the intensityof the light source corresponding to the received user input.

In addition, the projector 111 may provide the dimming function, basedon the content image analyzed by the processor 114 without the userinput. In detail, the projector 111 may control the LED to output theintensity of the light source, based on information on thecurrently-provided content image (e.g., type or brightness of thecontent image).

Meanwhile, the projector 111 may control a color temperature under thecontrol of the processor 114. Here, the processor 114 may control thecolor temperature, based on the content image. In detail, when thecontent image is identified is to be output, the processor 114 mayobtain color information for each frame of the content image whoseoutput is determined. In addition, the processor 114 may control thecolor temperature, based on the obtained color information for eachframe. Here, the processor 114 may obtain at least one primary color ofthe frame, based on the color information for each frame. In addition,the processor 114 may adjust the color temperature, based on the atleast one obtained primary color. For example, the color temperaturethat the processor 114 may adjust may be classified into a warm type ora cold type. Here, it may be assumed that a frame to be output(hereinafter, output frame) includes a fire scene. The processor 114 mayidentify (or obtain) that the primary color is a red color, based on thecolor information included in the current output frame. In addition, theprocessor 114 may identify the color temperature corresponding to theidentified primary color (red). Here, the color temperaturecorresponding to the red color may be the warm type. Meanwhile, theprocessor 114 may use an artificial intelligence (AI) model to obtainthe color information for the frame or the primary color. According toan embodiment, the artificial intelligence model may be stored in theelectronic apparatus 100 (e.g., memory 112). According to anotherembodiment, the artificial intelligence model may be stored in theexternal server capable of communicating with the electronic apparatus100.

Meanwhile, the electronic apparatus 100 may interoperate with anexternal device to control the lighting function. In detail, theelectronic apparatus 100 may receive lighting information from theexternal device. Here, the lighting information may include at least oneof brightness information or color temperature information determined bythe external device. Here, the external device may be a device connectedto the same network as the electronic apparatus 100 (e.g., internet ofthings (IoT) device included in the same home/work network) or a devicenot connected to the same network as the electronic apparatus 100 butcapable of communicating with the electronic apparatus (e.g., remotecontrol server). For example, it may be assumed that an externallighting device (e.g., IoT device) included in the same network as theelectronic apparatus 100 outputs red light with a brightness of 50. Theexternal lighting device (e.g., IoT device) may directly or indirectlytransmit the lighting information (e.g., information indicating that thered light is output with the brightness of 50) to the electronicapparatus 100. Here, the electronic apparatus 100 may control the outputof the light source, based on the lighting information received from theexternal lighting device. For example, the electronic apparatus 100 mayoutput the red light with the brightness of 50 when the lightinginformation received from the external lighting device includes theinformation indicating that the red light is output with the brightnessof 50.

Meanwhile, the electronic apparatus 100 may control the lightingfunction, based on biometric information. In detail, the processor 114may obtain the user biometric information. Here, the biometricinformation may include at least one of a body temperature, a heartrate, a blood pressure, a respiration or an electrocardiogram of theuser. Here, the biometric information may include various information inaddition to the above-mentioned information. For example, the electronicapparatus may include a sensor measuring the biometric information. Theprocessor 114 may obtain the user biometric information by using thesensor, and control the output of the light source based on the obtainedbiometric information. For another example, the processor 114 mayreceive the biometric information from the external device through theinput/output interface 113. Here, the external device may be theportable communication device (e.g., smart phone or wearable device) ofthe user. The processor 114 may obtain the user biometric informationfrom the external device, and control the output of the light source,based on the obtained biometric information. Meanwhile, according to anembodiment, the electronic apparatus may identify whether the user issleeping and the processor 114 may control the output of the lightsource, based on the user biometric information when it is identifiedthat the user is sleeping (or preparing to sleep).

The memory 112 may store at least one instruction on the electronicapparatus 100. In addition, the memory 112 may store an operating systemO/S for driving the electronic apparatus 100. The memory 112 may alsostore various software programs or applications for operating theelectronic apparatus 100 according to various embodiments of thedisclosure. In addition, the memory 112 may include a semiconductormemory such as a flash memory, or a magnetic storing medium such as ahard disk.

In detail, the memory 112 may store various software modules foroperating the electronic apparatus 100 according to various embodimentsof the disclosure, and the processor 114 may execute various softwaremodules stored in the memory 112 to control the operation of theelectronic apparatus 100. That is, the memory 112 may be accessed by theprocessor 114, and the processor 114 may perform readout, recording,correction, deletion, update and the like of data in the memory 112.

Meanwhile, in the disclosure, the term “memory 112” may include thememory 112, a read only memory (ROM, not shown) or a random accessmemory (RAM, not shown) in the processor 114, or a memory card (notshown) mounted on the electronic apparatus 100 (e.g., a micro securedigital (SD) card or a memory stick).

The processor 114 may be one or more processors. Here, the one or moreprocessors may each be a general-purpose processor such as a centralprocessing unit (CPU) or an application processor (AP); a graphics-onlyprocessor such as a graphics-processing unit (GPU) or a visualprocessing unit (VPU); or an AI-only processor such as a neuralprocessing unit (NPU).

The processor 114 may be electrically connected to the memory 112 tocontrol an overall operation of the electronic apparatus 100. In detail,the processor 114 may allow at least one instruction stored in thememory 112 to be executed to control the electronic apparatus 100.

The user interface 115 may include various types of input apparatuses.For example, the user interface 115 may include a physical button. Here,the physical button may include a function key, a direction key (e.g.,four-way key), or a dial button. According to an embodiment, thephysical button may be implemented as a plurality of keys. According toanother embodiment, the physical button may be implemented as one key.Here, when the physical button is implemented as the one key, theelectronic apparatus 100 may receive the user input in which the one keyis pressed for a threshold time or longer. When receiving the user inputin which the one key is pressed for the threshold time or longer, theprocessor 114 may perform a function corresponding to the user input.For example, the processor 114 may provide the lighting function, basedon the user input.

In addition, the user interface 115 may receive the user input by usinga non-contact method. To receive the user input by using a contactmethod, a physical force may be required to be transmitted to theelectronic apparatus. There may thus be a need for a method ofcontrolling the electronic apparatus regardless of the physical force.In detail, the user interface 115 may receive a user gesture and mayperform an operation corresponding to the received user gesture. Here,the user interface 115 may receive the user gesture by using a sensor(e.g., image sensor or infrared sensor).

In addition, the user interface 115 may receive the user input by usinga touch method. For example, the user interface 115 may receive the userinput by using a touch sensor. According to an embodiment, the touchmethod may be implemented as the non-contact method. For example, thetouch sensor may determine whether a user body approaches within athreshold distance. Here, the touch sensor may identify the user inputeven when the user does not touch the touch sensor. Meanwhile, accordingto another embodiment, the touch sensor may identify the user input bywhich the user touches the touch sensor.

Meanwhile, the electronic apparatus 100 may receive the user input invarious ways other than the user interface described above. In anembodiment, the electronic apparatus 100 may receive the user input byusing an external remote control apparatus. Here, the external remotecontrol apparatus may be a remote control apparatus corresponding to theelectronic apparatus 100 (e.g., a control device dedicated to theelectronic apparatus) or the portable communication device (e.g.,smartphone or wearable device) of the user. Here, the portablecommunication device of the user may store an application forcontrolling the electronic apparatus. The portable communication devicemay obtain the user input from an application stored therein, andtransmit the obtained user input to the electronic apparatus 100. Theelectronic apparatus 100 may receive the user input from the portablecommunication device and perform an operation corresponding to a usercontrol instruction.

Meanwhile, the electronic apparatus 100 may receive the user input byusing voice recognition. According to an embodiment, the electronicapparatus 100 may receive a user voice by using the microphone includedin the electronic apparatus. According to another embodiment, theelectronic apparatus 100 may receive the user voice from the microphoneor the external apparatus. In detail, the external apparatus may obtainthe user voice by using the microphone of the external apparatus, andtransmit the obtained user voice to the electronic apparatus 100. Theuser voice transmitted from the external apparatus may be audio data ordigital data converted from audio data (e.g., audio data converted intoa frequency domain). Here, the electronic apparatus 100 may perform anoperation corresponding to the received user voice. In detail, theelectronic apparatus 100 may receive the audio data corresponding to theuser voice by using the microphone. In addition, the electronicapparatus 100 may convert the received audio data into the digital data.In addition, the electronic apparatus 100 may convert the converteddigital data into text data by using a speech-to-text (STT) function.According to an embodiment, the speech-to-text (STT) function may bedirectly performed in the electronic apparatus 100, and according toanother embodiment, the speech-to-text (STT) function may be performedin the external server.

The electronic apparatus 100 may transmit the digital data to theexternal server. The external server may convert the digital data intothe text data, and obtain control instruction data based on theconverted text data. The external server may transmit the controlinstruction data (capable of also including the text data here) to theelectronic apparatus 100. The electronic apparatus 100 may perform anoperation corresponding to the user voice, based on the obtained controlinstruction data.

Meanwhile, the electronic apparatus 100 may provide a voice recognitionfunction by using assistance (e.g., an AI assistant such as Bixby™),which is only an embodiment. The electronic device 100 may provide thevoice recognition function by using a plurality of assistants. Here, theelectronic apparatus 100 may provide the voice recognition function byselecting one of the plurality of assistants, based on a trigger wordcorresponding to the assistant or a specific key included in a remotecontroller.

Meanwhile, the electronic apparatus 100 may receive the user input byusing a screen interaction. The screen interaction may refer to afunction in which the electronic apparatus identifies whether apredetermined event is generated based on the image projected to thescreen (or projection plane), and obtains the user input based on thepredetermined event. Here, the predetermined event may be an event inwhich a predetermined object is identified at a specific position (e.g.,position to which a user interface (UI) for receiving the user input isprojected). Here, the predetermined object may include at least one of auser body part (e.g., finger), a pointer or a laser point. When thepredetermined object is identified at the position corresponding to theprojected UI, the electronic apparatus 100 may identify that theelectronic apparatus 100 receives the user input for selecting theprojected UI. For example, the electronic apparatus 100 may project aguide image displaying the UI on the screen. In addition, the electronicapparatus 100 may identify whether the user selects the projected UI. Indetail, the electronic apparatus 100 may identify that the user selectsthe projected UI when the predetermined event is identified at theposition of the projected UI. Here, the projected UI may include atleast one item. Here, the electronic apparatus 100 may perform spatialanalysis to identify whether the predetermined event is generated at theposition of the projected UI. Here, the electronic apparatus 100 mayperform the spatial analysis by using the sensor (e.g., image sensor,infrared sensor, ToF sensor or distance sensor). The electronicapparatus 100 may identify whether the predetermined event is generatedat the specific position (to which the UI is projected) by performingthe spatial analysis. In addition, when it is identified that thepredetermined event is generated at the specific position (i.e.,position to which the UI is projected), the electronic apparatus 100 mayidentify that the electronic apparatus 100 receives the user input forselecting the UI corresponding to the specific position.

The input/output interface 113 is a component for performing thecommunication with the external apparatus. For example, the input/outputinterface 113 may input and output at least one of the audio signal orthe image signal by performing the communication with the externalapparatus. The input/output interface 113 may receive at least one ofthe audio signal or the image signal from the external apparatus, andmay output the control instruction to the external apparatus.

Meanwhile, in an embodiment of the disclosure, the input/outputinterface 113 may be implemented as a wired input/output interface of atleast one of a high definition multimedia interface (HDMI), a mobilehigh-definition link (MHL), a universal serial bus (USB), a USB C-type,a display port (DP), a thunderbolt, a video graphics array (VGA) port, ared-green-blue (RGB) port, a D-subminiature (D-SUB) or a digital visualinterface (DVI). According to an embodiment, the wired input/outputinterface may be implemented as an interface for inputting andoutputting only the audio signal, an interface for inputting andoutputting only the image signal, or one interface for inputting andoutputting both the audio signal and the image signal.

In addition, the electronic apparatus 100 may receive the data by usingthe wired input/output interface, which is only an example embodiment.The electronic apparatus 100 may receive the power by using the wiredinput/output interface. For example, the electronic apparatus 100 mayreceive the power from an external battery by using the USB C-type orreceive the power from an outlet by using a power adapter. For anotherexample, the electronic apparatus may receive the power from theexternal apparatus (e.g., laptop computer or monitor) by using a displayport (DP).

Meanwhile, in an embodiment of the disclosure, the input/outputinterface 113 may be implemented as the wireless input/output interfacethat performs the communication by using at least one of communicationmethods such as WiFi, WiFi direct, Bluetooth, ZigBee, third generation(3G), 3rd generation partnership project (3GPP) or long term evolution(LTE). According to an embodiment, a wireless input/output interface maybe implemented as an interface for inputting and outputting only theaudio signal, an interface for inputting and outputting only the imagesignal, or one interface for inputting and outputting both the audiosignal and the image signal.

In addition, the audio signal may be input through the wiredinput/output interface, and the image signal may be input through thewireless input/output interface. Alternatively, the audio signal may beinput through the wireless input/output interface, and the image signalmay be input through the wired input/output interface.

The audio output device 116 may be a component that outputs the audiosignal. For example, the audio output device 116 may include an audiooutput mixer, an audio signal processor, or an audio output module. Theaudio output mixer may synthesize the plurality of audio signals to beoutput into at least one audio signal. For example, the audio outputmixer may synthesize an analog audio signal and another analog audiosignal (e.g., analog audio signal received from the external source)into at least one analog audio signal. The audio output module mayinclude a speaker or an output terminal. According to an embodiment, theaudio output module may include the plurality of speakers. In this case,the audio output module may be disposed in the main body, and a soundemitted by covering at least a portion of a diaphragm of the audiooutput module may pass through a waveguide and be transmitted to theexternal source outside the main body. The audio output module mayinclude a plurality of audio output units. The plurality of audio outputunits may be arranged symmetrically to each other on an exterior of themain body, so that the audio output module may emit the sound in alldirections, i.e. 360 degrees.

The power supply device 117 may receive the power from the externalsource and supply the power to the various components of the electronicapparatus 100. The power supply device 117 according to an embodiment ofthe disclosure may receive the power by using various methods. In anembodiment, the power supply device 117 may receive the power by using adirect current (DC) power cord of 220 V. However, the power supplydevice 117 is not limited thereto, and may receive power by using a USBpower cord or may receive power by using a wireless charging method.

In addition, the power supply device 117 may receive power by using aninternal battery or the external battery. The power supply device 117according to an embodiment of the disclosure may receive the power byusing the internal battery. For example, the power supply device 117 mayuse at least one of the DC power cord of 220 V, the USB power cord, or aUSB C-Type power cord to charge power of the internal battery, and mayreceive the power by using the charged internal battery. In addition,the power supply device 117 according to an embodiment of the disclosuremay receive the power by using the external battery. For example, whenthe electronic apparatus and the external battery are connected to eachother by using various wired communication methods such as the USB powercord, the USB C-Type power cord and a socket groove. That is, the powersupply device 117 may directly receive power from the external battery,or charge the internal battery by using the external battery and receivethe power from the charged internal battery.

The power supply device 117 according to the disclosure may receivepower by using at least one of the plurality of power supply methodsdescribed above.

Meanwhile, with respect to power consumption, the electronic apparatus100 may have the power consumption less than a predetermined value(e.g., 43 W) due to a socket type, another standard, etc. Here, theelectronic apparatus 100 may change the power consumption to reduce thepower consumption when using the battery. That is, the electronicapparatus 100 may change the power consumption based on the power supplymethod and power usage.

Meanwhile, the electronic apparatus 100 according to an embodiment ofthe disclosure may provide various smart functions.

In detail, the electronic apparatus 100 may be connected to a mobileterminal apparatus controlling the electronic apparatus 100, and ascreen output from the electronic apparatus 100 may be controlled by theuser input which is input from the mobile terminal apparatus. Forexample, the mobile terminal apparatus may be implemented as thesmartphone including a touch display. Here, the electronic apparatus 100may receive screen data which is provided by the mobile terminalapparatus from the mobile terminal apparatus, and output the receivedscreen data, and the screen output from the electronic apparatus 100 maybe controlled based on the user input which is input from the mobileterminal apparatus.

The electronic apparatus 100 may be connected to the mobile terminalapparatus by using various communication methods such as miracast,airplay, wireless dalvik executable (DEX) and a remote personal computer(PC) method, and may share a content or music, provided by the mobileterminal apparatus.

In addition, the mobile terminal apparatus and the electronic apparatus100 may be connected to each other by using various connection methods.In an embodiment, the mobile terminal apparatus and the electronicapparatus 100 may be wirelessly connected to each other by searching themobile terminal apparatus for the electronic apparatus 100, or bysearching the electronic apparatus 100 for the mobile terminalapparatus. In addition, the electronic apparatus 100 may output thecontent provided by the mobile terminal apparatus.

In an embodiment, in a state in which a specific content or music isbeing output from the mobile terminal apparatus, the mobile terminalapparatus may be positioned near the electronic apparatus, and apredetermined gesture may then be detected by a display of the mobileterminal apparatus (by a motion tap view for example). In this case, theelectronic apparatus 100 may output the content or music being outputfrom the mobile terminal apparatus.

In an embodiment, in the state in which the specific content or music isbeing output from the mobile terminal apparatus, it may be detected thatthe mobile terminal apparatus is positioned near the electronicapparatus 100 by a predetermined distance or less (by a non-contact tapview for example), or the mobile terminal apparatus is in contact withthe electronic apparatus 100 twice at short intervals (by a contact tapview for example). In this case, the electronic apparatus 100 may outputthe content or music being output from the mobile terminal apparatus.

The above embodiment describes that the screen provided by the mobileterminal apparatus is the same as the screen provided by the electronicapparatus 100. However, the disclosure is not limited thereto. That is,when the mobile terminal apparatus and the electronic apparatus 100 areconnected to each other, the mobile terminal apparatus may output afirst screen provided by the mobile terminal apparatus and, theelectronic apparatus 100 may output a second screen provided by a mobileterminal apparatus, which is different from the first screen. Forexample, the first screen may be a screen provided by a firstapplication installed on the mobile terminal apparatus, and the secondscreen may be a screen provided by a second application installed on themobile terminal apparatus. For example, the first screen and the secondscreen may be different screens provided by one application installed onthe mobile terminal apparatus. In addition, for example, the firstscreen may be a screen including a remote controller type UI forcontrolling the second screen.

The electronic apparatus 100 according to the disclosure may output astandby screen. For example, the electronic apparatus 100 may output thestandby screen when the electronic apparatus 100 is not connected to theexternal apparatus or there is no input received from the externalapparatus for a predetermined time. A condition for the electronicapparatus 100 to output the standby screen is not limited to theabove-described example, and the standby screen may be output based onvarious conditions.

The electronic apparatus 100 may output the standby screen in the formof a blue screen. However, the disclosure is not limited thereto. Forexample, the electronic apparatus 100 may obtain an atypical object byextracting only the shape of a specific object from the data receivedfrom the external apparatus, and output the standby screen including theobtained atypical object.

FIG. 3A is a view showing an example in which the first image isprojected to the partial region of the region in which the screen isexposed, according to an embodiment of the disclosure; and FIG. 3B is aview showing another example in which the first image is projected tothe partial region of the region in which the screen is exposed,according to an embodiment of the disclosure.

According to the disclosure, the electronic apparatus 100 may projectthe first image to only the partial region of the region in which thescreen 210 of the screen device 200 is exposed. In detail, theelectronic apparatus 100 may project the first image only to the 1-1-thregion 10-1, by excluding the 1-2-th region 10-2 in which the screen 210is not exposed, from the entire region 10 to which the electronicapparatus 100 may project the image.

Referring to FIG. 3A, the electronic apparatus 100 may control amonochrome image such as black and white to be projected in the 1-2-thregion 10-2 in which the screen 210 is not exposed, and the first imageto be projected in the 1-1-th region 10-1 in which the screen 210 isexposed, in the entire region 10. In an embodiment, when the 1-1-thregion 10-1 in which the screen 210 is exposed has an increased size asthe screen 210 is unrolled, the electronic apparatus 100 may also changea size of the first image projected to the 1-1-th region 10-1 in whichthe screen 210 is exposed and then project the first image. For example,when the 1-1-th region 10-1 in which the screen 210 is exposed has theincreased size, the electronic apparatus 100 may project the first imageto have the same effect as the image climbing up from the bottom asshown in FIG. 3A.

Referring to FIG. 3B, the electronic apparatus 100 may control the imagenot to be projected to the 1-2-th region 10-2 in which the screen 210 isnot exposed, and the first image to be projected to the 1-1-th region10-1 in which the screen 210 is exposed, in the entire region 10. In anembodiment, when the 1-1-th region 10-1 in which the screen 210 isexposed has the increased size as the screen 210 is unrolled, theelectronic apparatus 100 may change a size of the projected image sothat a region of the projected image is increased based on the 1-1-thregion 10-1 in which the screen 210 is exposed.

FIG. 4 is a view showing an example in which the electronic apparatuscontrols the projected first image as the screen is unrolled, accordingto an embodiment of the disclosure.

The electronic apparatus 100 may obtain screen information of the screendevice 200. As described above, the screen information may include theinformation on the size of the screen 210, the first screen informationon the speed at which the screen 210 is unfolded as the screen 210 ofthe screen device 200 is unrolled, and the second screen information onthe speed at which the screen 210 is folded as the screen 210 is rolled.

In addition, the electronic apparatus 100 may obtain the information onthe first time at which the upper end of the screen 210 reaches theminimum height of the image projected by the electronic device 100 andthe information on the second time at which the screen reaches itsmaximum height when the screen 210 is unrolled based on the first screeninformation.

In addition, when receiving the user command to project the image, theelectronic apparatus 100 may transmit the first operation informationinstructing the screen device 200 to unroll the screen to the screendevice 200. In addition, the electronic apparatus 100 may project thefirst image to the region in which the screen is exposed when the firsttime elapses after the screen device 200 starts to unroll the screen210, based on the first operation information. Here, the first time maybe time at which the upper end of the screen 210 reaches the minimumheight of the image projected by the electronic device 100. That is, asshown in FIG. 4, the first time may be an “A” second, and the electronicapparatus 100 may project the first image to the region in which anupper portion of the screen 210 is exposed from a point 42 at which theupper end of the screen 210 is positioned after the “A” second elapsesfrom the time point when the screen device 200 starts to unroll thescreen.

In addition, the electronic apparatus 100 may project the content imagewhen the screen device 200 completes the unrolling of the screen, basedon the screen information. The electronic apparatus 100 may project thefirst image from the time point when the screen device 200 starts theoperation of unrolling the screen until after the second time. As shownin FIG. 4, the second time may be a sum of the “A” second and a “B”second, and the electronic apparatus 100 may project the first image tothe region in which the upper portion of the screen 210 is exposed fromthe point 42 for the “B” second after the “A” second from the time pointwhen the screen device 200 starts to unroll the screen. That is, theelectronic apparatus 100 may project the first image as having theincreased size from the point 42 to a point 43 for the “B” second as thescreen 210 is unrolled.

FIG. 5 is a flowchart showing the electronic apparatus interoperatingwith the screen device, according to the disclosure.

Referring to FIG. 5, an electronic apparatus 100 may obtain screeninformation of a screen device 200 (S510). Next, the electronicapparatus 100 may transmit first operation information to the screendevice 200 (S520). For example, the electronic apparatus 100 maytransmit the first operation information to the screen device 200 whenreceiving a user command to project an image. According to thedisclosure, the user command to project the image may be a user commandto turn on power of the electronic apparatus 100 or a user command toproject the image by using the electronic apparatus 100.

In addition, the screen device 200 may unroll a screen 210, based on thefirst operation information (S530). That is, the screen device 200 mayunroll the screen to unfold the screen 210 when receiving the firstoperation information. In addition, the electronic apparatus 100 mayproject a first image to at least a partial region of a region in whichthe screen is exposed based on the screen information while the screen210 of the screen device 200 is unrolled (S540). Here, the first imagemay be a welcome image provided while the screen 210 is unrolled.According to the disclosure, a size of the welcome image may be changedbased on a size of the region in which the screen 210 is exposed.

In addition, the electronic apparatus 100 may project a content imagewhen the screen device 200 completes the unrolling of the screen, basedon the screen information (S550). The content image according to thedisclosure may be an image provided by the electronic apparatus 100 oran image provided by an external apparatus connected to the electronicapparatus 100, and may be an image that a user wants to view.

Next, the electronic apparatus 100 may transmit second operationinformation to the screen device 200 (S560). For example, the electronicapparatus 100 may transmit the second operation information instructingthe screen device 200 to roll the screen to the screen device 200 whenreceiving a user command not to project the image. According to thedisclosure, the user command not to project the image may be a usercommand to turn off the power of the electronic apparatus 100 or a usercommand not to project the image.

Next, the screen device 200 may roll the screen 210, based on the secondoperation information (S570). That is, the screen device 200 may rollthe screen to fold the screen 210 when receiving the second operationinformation. In addition, while the screen 210 of the screen device 200is rolled, the electronic apparatus 100 may project a second image tothe at least partial region of the region in which the screen is exposedbased on the screen information (S580). Here, the second image may be afarewell image provided while the screen 210 is rolled. According to thedisclosure, a size of the farewell image may be changed based on thesize of the region in which the screen 210 is exposed.

FIG. 6 is a flowchart showing an example in which an external apparatuscontrols the electronic apparatus and the screen device, according to anembodiment of the disclosure.

The operations of the electronic apparatus 100 and the screen device 200may be controlled by an external apparatus 300 which may control theelectronic apparatus 100 and the screen device 200. For example, theexternal apparatus 300 may be implemented as a remote control capable ofperforming a master boot record (MBR) function, or may be implemented asa user terminal apparatus capable of communicating with the electronicapparatus 100 and the screen device 200.

Referring to FIG. 6, the electronic apparatus 100 may obtain screeninformation of the screen device 200 (S605). For example, the electronicapparatus 100 may obtain screen information corresponding to the screendevice 200 among information on the plurality of screen devicespre-stored in the electronic apparatus 100 or an external server, basedon the manufacturer and product name of the screen device 200.

Next, the external apparatus 300 may transmit a power-on signal to theelectronic apparatus 100 (S610). For example, the external apparatus 300may transmit the power-on signal to the electronic apparatus 100 whenreceiving the user command to turn on the power of the electronicapparatus 100 from the external apparatus 300. For example, the externalapparatus 300 may transmit the power-on signal to the electronicapparatus 100 by using a first communication method (e.g., Bluetoothmethod). The electronic apparatus 100 may transmit the first operationinformation to the external apparatus 300 when receiving the power-onsignal (S615). For example, the electronic apparatus 100 may transmitthe first operation information to the external apparatus 300 by usingthe first communication method (e.g., Bluetooth method). Here, the firstoperation information may include a control instruction to unroll thescreen 210.

The external apparatus 300 may transmit the first operation informationto the screen device 200 when receiving the first operation information(S620). For example, the external apparatus 300 may transmit the firstoperation information to the screen device 200 by using a secondcommunication method (e.g., infrared ray (IR) communication method). Thescreen device 200 may unroll the screen, based on the first operationinformation when receiving the first operation information (S625).

In addition, while the screen device 200 performs the operation ofunrolling the screen, the electronic apparatus 100 may project the firstimage to a region corresponding to the screen of the screen device,based on the screen information (S630). In addition, the electronicapparatus 100 may project the content image when the screen device 200completes the unrolling of the screen, based on the screen information(S635).

Next, the external apparatus 300 may transmit a power-off signal to theelectronic apparatus 100 (S640). For example, when receiving the usercommand to turn off the power of the electronic apparatus 100, theexternal apparatus 300 may transmit the power-off signal to theelectronic apparatus 100. For example, the external apparatus 300 maytransmit the power-off signal to the electronic apparatus 100 by usingthe first communication method (e.g., Bluetooth method). The electronicapparatus 100 may transmit the second operation information to theexternal apparatus 300 when receiving the power-off signal (S645). Forexample, the electronic apparatus 100 may transmit the second operationinformation to the external apparatus 300 by using the firstcommunication method (e.g., Bluetooth method). Here, the secondoperation information may include a control instruction to roll thescreen 210.

The external apparatus 300 may transmit the second operation informationto the screen device 200 when receiving the second operation information(S650). For example, the external apparatus 300 may transmit the secondoperation information to the screen device 200 by using the secondcommunication method (e.g., IR communication method). The screen device200 may roll the screen, based on the second operation information whenreceiving the second operation information (S655).

In addition, while the screen device 200 performs the operation ofrolling the screen, the electronic apparatus 100 may project the secondimage to the region corresponding to the screen of the screen device,based on the screen information (S660).

FIG. 7A is a view showing that the screen is moved as the screen deviceunrolls the screen, according to an embodiment of the disclosure.

In an embodiment of the disclosure, the electronic apparatus 100 may beimplemented as an ultra-short throw projector apparatus, and the screendevice 200 and the electronic apparatus 100 may thus be required to beplaced close to each other. In this case, while the screen 210 is movedto be unrolled from or rolled into a main body 220, a minute distancedifference “c” between the screen 210 and the electronic apparatus 100may greatly change a size of the image projected to the screen. Forexample, in case of the ultra-short throw projector apparatus having athrough ratio of 0.189, if the distance “c” between the screen 210 andthe electronic apparatus 100 is changed by 5 mm, a horizontal size ofthe image projected to the screen may be changed by 26.5 mm. Theelectronic apparatus 100 according to the disclosure may thus obtainmotion information of the screen 210 of the screen device 200, and maycorrect and project the first image and the second image.

FIG. 7B is a view showing an example in which the keystone correction isperformed based on the motion information of the screen device,according to an embodiment of the disclosure.

In an embodiment of the disclosure, the electronic apparatus 100 mayperform the keystone correction on the first image and the second image,based on the motion information of the screen device 200. FIG. 7B showsa case in which the upper end of the screen 210 becomes closer to theelectronic apparatus 100 due to the motion of the screen 210 occurringwhile the screen 210 is moved to be unrolled or rolled. In this case, alower end of the screen 210 may be relatively farther away from theelectronic apparatus 100 than the upper end, when compared to a generalcase, and a horizontal size of the image projected to the lower end maythus become longer than a horizontal length of the image projected tothe upper end. The electronic apparatus 100 may thus project the imageby performing the keystone correction that reduces a horizontal lengthof the image projected to the lower end of the screen 210 as shown inFIG. 7B.

FIG. 7C is a view showing an example in which a third image is projectedbased on the motion information of the screen device, according to anembodiment of the disclosure.

In an embodiment of the disclosure, the electronic apparatus 100 mayproject a third image 70 when the motion information indicates that themotion of the screen 210 has a value greater than or equal to thepredetermined value while the screen 210 is unrolled.

In an embodiment of the disclosure, if the screen 210 has the largemotion, there may be a limitation in performing the keystone correctionthereon. In this case, the electronic apparatus 100 may project thethird image 70 which is the image projected only to the partial regionof the screen 210.

According to an embodiment of the disclosure, the third image may be theimage projected to a reduced region than that of the existing firstimage.

In an embodiment of the disclosure, the third image may be the image forminimizing the motion sickness of the user, such as a wave patternimage.

In an embodiment of the disclosure, the third image may be a blurredimage of the first image projected to the screen 210.

FIG. 8A is a view showing a sensor of the screen device, according to anembodiment of the disclosure.

In an embodiment of the disclosure, the screen device 200 may beimplemented to transmit the state information to the electronicapparatus 100. For example, the screen device 200 may include aplurality of sensors 230-1 and 230-2 to transmit the state informationby using the IR communication method as shown in FIG. 8A. The pluralityof sensors 230-1 and 230-2 may include the plurality of first sensors230-1 disposed inside the main body 220 of the screen device 200 and thesecond sensor 230-2 disposed outside the main body 220. Here, theplurality of sensors 230-1 and 230-2 may include an IR transmitfrequency (Tx) for transmitting the state information of the screendevice 200 to the electronic apparatus 100 and an IR receive frequency(Rx) for receiving operation information of the screen device 200 fromthe electronic apparatus 100. In addition, the screen device 200 mayperform an IR key data mapping to define data on the state informationof the screen device 200, delivered to the electronic apparatus 100, andmay transmit the defined data to the electronic apparatus 100 throughthe IR Tx. For example, the screen device 200 may transmit, to theelectronic apparatus 100, the state information indicating that thescreen device 200 is turned on, the screen device 200 is turned off, thescreen 210 is unrolled, the screen 210 is rolled, the screen device 200is unable to unroll the screen or the screen device 200 is unable toroll the screen.

FIG. 8B is a view showing a configuration of the sensor of the screendevice, according to an embodiment of the disclosure.

In an embodiment of the disclosure, the plurality of sensors 230-1 and230-2 may be implemented as an IR transmitter as shown in FIG. 8B. Theplurality of sensors 230-1 and 230-2 shown in FIG. 8B may be implementedas a solid line 80 and a dotted line 85, which are shown relativelythick (e.g., 0.5 mm). In addition, the line 80 of the plurality ofsensors 230-1 and 230-2 and a power plane of 3.3 V may be disposedadjacent to each other.

FIG. 9 is a view showing a coverage region of an IR sensor radiated fromthe screen device, according to an embodiment of the disclosure; andFIG. 10 is a view showing the state information of the screen device,transmitted from the screen device, according to an embodiment of thedisclosure.

In an embodiment of the disclosure, the screen device 200 may transmitthe state information to the electronic apparatus 100 by using the IRcommunication method. In this case, the screen device 200 may radiatethe state information based on the plurality of sensors 230-1 and 230-2as shown in FIG. 8A, thereby securing an IR coverage in an entire regionof an environment in which the screen device 200 is installed.

That is, when referring to FIG. 9, a region 90-2 may be a region where asignal radiated from the IR sensor directly reaches, and a region 90-1may be a region where the IR signal radiated from the IR sensor mayreach by being reflected by an object, a wall, etc. That is, the screendevice 200 may use the plurality of sensors 230-1 and 230-2 as shown inFIG. 8A, may use the reflection of the IR signal radiated from the IRsensor to transmit the state information to apparatuses positioned inthe entire region of the environment in which the screen device 200 isinstalled.

In addition, even when the electronic apparatus 100 is embedded andinstalled as shown in FIG. 10, the electronic apparatus 100 may receivethe IR signal of the screen device 200 by the reflection of the IRsignal as shown in FIG. 9. That is, the IR signal may be radiated fromeach of the plurality of sensors 230-1 and 230-2 of the screen device200, the radiated IR signal may be reflected on the wall, the object orthe like in the environment in which the screen device 200 is installed,and the reflected IR signal may then reach the electronic apparatus 100.

FIG. 11 is a sequence view showing the screen device interoperating withthe electronic apparatus to transmit the state information, according tothe disclosure.

Referring to FIG. 11, the screen device 200 may transmit the screeninformation of the screen device 200 to the electronic apparatus 100(S1105). For example, the screen information may include the informationon the size of the screen 210, the first screen information on the speedat which the screen 210 is unfolded as the screen 210 of the screendevice 200 is unrolled, and the second screen information on the speedat which the screen 210 is folded as the screen 210 is rolled. However,the disclosure is not limited thereto. The electronic apparatus 100 mayobtain the screen information corresponding to the screen device 200among information on the plurality of screen devices pre-stored in theelectronic apparatus 100 or the external server, based on themanufacturer and product name of the screen device 200.

Next, the electronic apparatus 100 may interoperate with the screendevice 200 (S1110). In an embodiment, the electronic apparatus 100 mayobtain the information on the first time at which the upper end of thescreen 210 reaches a minimum height of the image projected by theelectronic device 100 and the information on the second time at whichthe screen reaches its maximum height when the screen 210 is unrolledbased on the first screen information. In addition, the electronicapparatus 100 may also obtain the information on the third time at whichthe upper end of the screen 210 reaches the minimum height of the imageprojected by the electronic device 100 when the screen 210 is rolledbased on the second screen information.

Next, the screen device 200 may transmit the first operation informationto the electronic apparatus 100 (S1115). The first operation informationof FIG. 11 may be the state information indicating that the screendevice 200 performs the operation of unrolling the screen 210. Next, thescreen device 200 may unroll the screen 210 based on the first operationinformation (S1120).

The electronic apparatus 100 may project the first image to the at leastpartial region of the region in which the screen 210 is exposed based onthe screen information when receiving the first operation information(S1125).

Next, the screen device 200 may complete the unrolling of the screen(S1130). The screen device 200 may transmit the third operationinformation to the electronic apparatus 100 when completing theunrolling of the screen. The third operation information of FIG. 11 maybe the state information indicating that the screen device 200 completesthe unrolling of the screen 210. In addition, the electronic apparatus100 may project the content image when receiving the third operationinformation.

Next, the screen device 200 may transmit the second operationinformation to the electronic apparatus 100. The second operationinformation of FIG. 11 may be the state information indicating that thescreen device 200 performs the operation of rolling the screen 210. Theelectronic apparatus 100 may project the second image to the at leastpartial region of the region in which the screen 210 is exposed based onthe screen information when receiving the second operation information.

FIG. 12 is a flowchart showing the operation of the electronic apparatusaccording to the disclosure.

Referring to FIG. 12, the electronic apparatus 100 may obtain the screeninformation of the screen device 200 connected to the electronicapparatus 100 (S1210).

In addition, the electronic apparatus 100 may receive the user commandto project the image (S1220). According to the disclosure, the usercommand to project the image may be a user command to turn on the powerof the electronic apparatus 100 or a user command to project the imageby using the electronic apparatus 100. In addition, the electronicapparatus 100 may receive the user command to project the image from theexternal apparatus that may control the electronic apparatus 100, or mayreceive the user command to project the image through the physicalbutton included in the electronic apparatus 100.

The electronic apparatus 100 may transmit the first operationinformation instructing that the screen device 200 unroll the screen tothe screen device 200 when receiving the user command to project theimage (S1230). The screen device 200 may then unroll the screen 210 whenreceiving the first operation information.

In addition, the electronic apparatus 100 may project the first image tothe at least partial region of the region in which the screen 210 isexposed based on the screen information while the screen 210 of thescreen device 200 is unrolled based on the first operation information(S1240).

In an embodiment of the disclosure, the electronic apparatus 100 mayobtain the motion information of the screen device while the screen 210of the screen device 200 is unrolled based on the first operationinformation. For example, the electronic apparatus 100 may obtain themotion information based on the information on the distance between theupper end of the screen 210 and the electronic apparatus 100. Forexample, the electronic apparatus 100 may obtain the motion informationby obtaining the vibration information of the screen 210 by using thevibration sensor attached to the screen device 200. In addition, theelectronic apparatus 100 may correct the first image based on the motioninformation and project the corrected first image.

FIG. 13 is a view showing an electronic apparatus and a screen device,according to an embodiment of the disclosure.

The above-described examples show that the screen 210 of the screendevice 200 is unfolded by rising and being unrolled from the screendevice 200 installed on the floor or the like, and the disclosure is notlimited thereto.

That is, referring to FIG. 13, the screen device 200 may be installed onthe ceiling, the wall or the like, and the screen 210 may be unfolded bygoing down and being unrolled from the screen device 200 installed onthe ceiling, the wall or the like.

FIG. 14 is a view showing an electronic apparatus and a screen device,according to an embodiment of the disclosure.

The examples described above show that the electronic apparatus 100 isfixed to a specific position and projects the projected image to thescreen device 200.

That is, an electronic apparatus 100-1 as shown in FIG. 14 may beimplemented as a portable electronic apparatus that may be movable andprojects the projected image. For example, the electronic apparatus100-1 may be the home or industrial projector apparatus, may be thelighting apparatus used in daily life, and may be the audio apparatusincluding the audio module. Meanwhile, the electronic apparatus 100-1according to an embodiment of the disclosure is not limited to theabove-described apparatuses, and may be implemented as the electronicapparatus 100-1 having two or more functions of the above-describedapparatuses. For example, the electronic apparatus 100-1 may be used asthe display apparatus, the lighting apparatus or the audio apparatus byturning off its projector function and turning on the lighting functionor the speaker function, or may be used as the artificial intelligence(AI) speaker including the microphone or the communication apparatus,based on the operation of the processor.

In detail, the electronic apparatus 100-1 may include the TOF sensor fordetecting a surface of the screen, to which the projected image isprojected, and may obtain information on a distance between the screen210 of the screen device 200 and the electronic apparatus 100-1 by usingthe TOF sensor.

In addition, the electronic apparatus 100-1 may control the first imageto be projected to the at least partial region of the region in whichthe screen 210 is exposed by using the screen information and distanceinformation of the screen device 200 while the screen 210 of the screendevice 200 is unrolled.

In addition, the electronic apparatus 100-1 may control the second imageto be projected to the at least partial region of the region in whichthe screen 210 is exposed by using the screen information and distanceinformation of the screen device 200 while the screen 210 of the screendevice 200 is rolled.

FIG. 15 is a view showing an example in which the electronic apparatusreceives the state information transmitted from the screen device,according to an embodiment of the disclosure.

In an embodiment of the disclosure, the screen device 200 may transmitthe state information to the electronic apparatus 100-1 by using the IRcommunication method. In this case, the screen device 200 may radiatethe state information by using the plurality of sensors 230-1 and 230-2as shown in FIG. 15, thereby securing the IR coverage in the entireregion of the environment in which the screen device 200 is installed.

That is, as described with reference to FIG. 9, the state informationradiated from the plurality of sensors 230-1 and 230-2 may be directlytransmitted to the electronic apparatus 100-1, or may be reflected bythe object, the wall or the like and then transmitted to the electronicapparatus 100-1. In this manner, the state information may betransmitted to the apparatuses positioned in the entire region of theenvironment in which the screen device 200 is installed.

The disclosure may be diversely modified and have various embodiments,and the example embodiments of the disclosure are thus shown in thedrawings and described in detail in the detailed description. However,it is to be understood that the technology mentioned in the disclosureis not limited to the example embodiments, and includes variousmodifications, equivalents, and/or alternatives according to theembodiments of the disclosure. Throughout the accompanying drawings,similar components are denoted by similar reference numerals.

In describing the disclosure, if it is decided that a detaileddescription for the known functions or configurations related to thedisclosure may unnecessarily obscure the gist of the disclosure, thedetailed description thereof is omitted.

In addition, the embodiments described above may be modified in severaldifferent forms, and the scope and spirit of the disclosure are notlimited to the embodiments. Rather, these embodiments are provided tomake the disclosure thorough and complete, and to completely transferthe spirit of the disclosure to those skilled in the art.

Terms used in the disclosure are used only to describe the exampleembodiments rather than limiting the scope of the disclosure. Singularforms used herein are intended to include plural forms unless explicitlyindicated otherwise.

In the disclosure, the expression “have,” “may have,” “include,” “mayinclude” or the like, indicates existence of a corresponding feature(for example, a numerical value, a function, an operation or a componentsuch as a part), and does not exclude existence of an additionalfeature.

In the disclosure, the expression “A or B,” “at least one of A and/or B”or “one or more of A and/or B” or the like, may include all possiblecombinations of items enumerated together. For example, the scope of theexpression or phrase “A and/or B” includes all of the following: (1) theitem “A”, (2) the item “B”, and (3) the combination of items “A and B”.For example, the scope of the expressions or phrases “A or B,” “at leastone of A and B,” or “at least one of A or B” includes all of: 1) a casein which at least one A is included, 2) a case in which at least one Bis included, and 3) a case in which both of at least one A and at leastone B are included.

The expressions “first,” “second” and the like, used in the disclosuremay indicate various components regardless of a sequence and/orimportance of the components. These expressions are only used in orderto distinguish one component from the other components, and do not limitthe corresponding components.

If any component (for example, a first component) is mentioned to be(operatively or communicatively) coupled with/to or connected to anothercomponent (for example, a second component), it is to be understood thatthe any component is directly coupled to the another component or may becoupled to the another component through another component (for example,a third component).

On the other hand, if it is mentioned that any component (for example,the first component) is “directly coupled” or “directly connected” toanother component (for example, the second component), it is to beunderstood that the other component (for example, the third component)is not present between any component and the another component.

An expression “configured (or set) to” used in the disclosure may bereplaced by an expression “suitable for,” “having the capacity to,”“designed to,” “adapted to,” “made to” or “capable of” based on asituation. A term “configured (or set) to” may not necessarily indicate“specifically designed to” in hardware.

Instead, an expression “an apparatus configured to” may indicate thatthe apparatus may “perform˜” together with other apparatuses orcomponents. For example, “a processor configured (or set) to perform A,B and C” may indicate a dedicated processor (for example, an embeddedprocessor) for performing the corresponding operations or ageneric-purpose processor (for example, a central processing unit (CPU)or an application processor) that may perform the correspondingoperations by executing one or more software programs stored in a memoryapparatus.

In the embodiments, a “module” or like term may perform at least onefunction or operation, and be implemented by hardware or software or beimplemented by a combination of hardware and software. In addition, aplurality of “modules” may be integrated in at least one module and beimplemented by at least one processor except for a “module” that needsto be implemented by specific hardware.

Meanwhile, the various elements and regions in the drawings areschematically shown. Therefore, the spirit of the disclosure is notlimited by relative sizes or intervals shown in the accompanyingdrawings.

Meanwhile, the various embodiments of the disclosure described above maybe implemented in a computer or a computer readable recording mediumusing software, hardware or a combination of software and hardware.According to a hardware implementation, the embodiments described in thedisclosure may be implemented using at least one of an applicationspecific integrated circuit (ASIC), a digital signal processor (DSP), adigital signal processing device (DSPD), a programmable logic device(PLD), a field programmable gate array (FPGA), a processor, acontroller, a micro-controller, a microprocessor or an electric unit forperforming another function. In some cases, the embodiments described indisclosure may be implemented by the processor itself. According to asoftware implementation, the embodiments such as procedures andfunctions described in the disclosure may be implemented by separatesoftware modules. Each of the software modules may perform one or morefunctions and operations described in the disclosure.

Meanwhile, one or more aspects of the methods according to the variousembodiments of the disclosure described above may be stored as a programor as instructions in a non-transitory readable medium. Thenon-transitory readable medium may be mounted and used in variousapparatuses.

The non-transitory readable medium is not a medium that temporarilystores data therein, such as a register, a cache, a memory or the like,and indicates a medium that semi-permanently stores data therein and isreadable by an apparatus. In detail, programs for performing the variousmethods described above may be stored and provided in the non-transitoryreadable medium such as a compact disc (CD), a digital versatile disc(DVD), a hard disc, a blue-ray disc, a universal serial bus (USB), amemory card, a read only memory (ROM) or the like.

According to an embodiment, the methods according to the variousembodiments disclosed in the disclosure may be included and provided ina computer program product. The computer program product may be tradedas a product between a seller and a purchaser. The computer programproduct may be distributed in the form of a storage medium (for example,a compact disc read only memory (CD-ROM)) that may be read by themachine or online through an application store (for example,PlayStore™). In case of the online distribution, at least portions ofthe computer program product may be at least temporarily stored in astorage medium such as a memory of a server of a manufacturer, a serverof an application store, or a relay server or be temporarily created.

In addition, although the embodiments are shown and described in thedisclosure as above, the disclosure is not limited to the abovementioned example embodiments, and may be variously modified by thoseskilled in the art to which the disclosure pertains without departingfrom the gist of the disclosure as disclosed in the accompanying claims.These modifications should also be understood to fall within the scopeand spirit of the disclosure. cm What is claimed is:

1. An electronic apparatus, comprising: a projector; an input/outputinterface; a memory; and a processor configured to control theelectronic apparatus by executing at least one instruction stored in thememory to: obtain screen information of a screen device connected to theelectronic apparatus, control the input/output interface to transmitfirst operation information corresponding to an unrolling of the screendevice in response to receiving a user command to project an image, andcontrol the projector to project a first image to at least a partialregion of a region in which a screen of the screen device is exposedbased on the screen information while the screen of the screen device isbeing unrolled, based on the first operation information.
 2. Theelectronic apparatus as claimed in claim 1, wherein the processor isconfigured to control the input/output interface to transmit secondoperation information corresponding to rolling of the screen device inresponse to receiving a user command not to project the image, andcontrol the projector to project a second image to the at least thepartial region of the region in which the screen is exposed based on thescreen information while the screen is being rolled, based on the secondoperation information.
 3. The electronic apparatus as claimed in claim1, wherein the processor is configured to obtain motion information ofthe screen while the screen device unrolls the screen, based on thefirst operation information, and control the projector to correct thefirst image, based on the obtained motion information, and to projectthe corrected first image.
 4. The electronic apparatus as claimed inclaim 3, wherein the processor is configured to obtain the motioninformation, based on information on a distance between an upper end ofthe screen and the electronic apparatus while the screen device unrollsthe screen, based on the first operation information.
 5. The electronicapparatus as claimed in claim 3, wherein the processor is configured toobtain vibration information of the screen by using a vibration sensorwhile the screen device unrolls the screen, based on the first operationinformation, and control the projector to correct the first image, basedon the vibration information, and to project the corrected first imageto the at least the partial region of the region in which the screen isexposed.
 6. The electronic apparatus as claimed in claim 3, wherein theprocessor is configured to control the projector to project a thirdimage when the motion information has a value greater than or equal to apredetermined value.
 7. The electronic apparatus as claimed in claim 1,wherein the processor is configured to, after the screen device unrollsthe screen based on the first operation information, control theprojector to project the first image to the at least the partial regionof the region in which the screen is exposed after a first time elapses.8. The electronic apparatus as claimed in claim 1, wherein the processoris configured to control the input/output interface to transmit thefirst operation information to an external apparatus controlling theelectronic apparatus by using a first communication method in responseto receiving power-on information of the electronic apparatus from theexternal apparatus, and control the projector to project the first imageto the at least the partial region of the region in which the screen isexposed while the screen is being unrolled as the external apparatustransmits the first operation information to the screen device by usinga second communication method.
 9. The electronic apparatus as claimed inclaim 1, wherein the processor is configured to control the input/outputinterface to receive, from the screen device, the first operationinformation corresponding to unrolling of the screen device, control theprojector to project the first image to the at least the partial regionof the region in which the screen is exposed based on the firstoperation information, and control the projector to project a contentimage different from the first image in response to receiving, from thescreen device, third operation information indicating that the screendevice has completed the unrolling of the screen.
 10. The electronicapparatus as claimed in claim 1, wherein the processor is configured tocontrol the input/output interface to receive, from the screen devicewhich receives the first operation information, state informationindicating that the screen device is unable to unroll the screen, andallow information indicating that the screen device is unable to unrollthe screen to be provided based on the state information.
 11. A methodof an electronic apparatus, the method comprising: obtaining screeninformation of a screen device connected to the electronic apparatus,transmitting first operation information corresponding to an unrollingof the screen device in response to receiving a user command to projectan image; and projecting a first image to at least a partial region of aregion in which a screen of the screen device is exposed based on thescreen information while the screen of the screen device is beingunrolled, based on the first operation information.
 12. The method asclaimed in claim 11, further comprising: transmitting second operationinformation corresponding to rolling of the screen device in response toreceiving a user command not to project the image; and projecting asecond image to the at least the partial region of the region in whichthe screen is exposed based on the screen information while the screenis being rolled, based on the second operation information.
 13. Themethod as claimed in claim 11, wherein the projecting includes:obtaining motion information of the screen while the screen deviceunrolls the screen, based on the first operation information, andcorrecting the first image, based on the obtained motion information,and projecting the corrected first image.
 14. The method as claimed inclaim 13, wherein the obtaining of the motion information includesobtaining the motion information, based on information on a distancebetween an upper end of the screen and the electronic apparatus whilethe screen device unrolls the screen, based on the first operationinformation.
 15. The method as claimed in claim 13, further comprising:obtaining vibration information of the screen by using a vibrationsensor while the screen device unrolls the screen, based on the firstoperation information; correcting the first image, based on thevibration information; and projecting the corrected first image to theat least the partial region of the region in which the screen isexposed.